Confinement Factors and Gain in Optical Amplifiers.

T.D. Visser, H. Blok, B. Demeulenaere, D. Lenstra

    Research output: Contribution to JournalArticleAcademicpeer-review


    A new identity is derived which relates the gain and the field distribution (or confinement factor) in a dielectric waveguide with complex refractive indices. This identity is valid for any guided mode of waveguides with an arbitrary cross section. It provides a new check of the accuracy of mode solvers. Also, it can be used in a variational approach to predict the gain or loss of a guided mode based on knowledge of confinement factors. It is shown that a previous analysis that is often used, is not correct. In addition, approximate expressions for the gain in slab waveguides are presented.
    Original languageEnglish
    Pages (from-to)1763-1766
    JournalIEEE Journal of Quantum Electronics
    Publication statusPublished - 1997


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